"οπτική τέχνη" meaning in Grec

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en grec",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en grec",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en grec issus d’un mot en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Grec",
      "orig": "grec",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(1964) Traduction de l'anglais optical art,composé de οπτική et de τέχνη."
  ],
  "lang": "Grec",
  "lang_code": "el",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "optikí téchni"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en grec de la peinture",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Op art"
      ],
      "id": "fr-οπτική_τέχνη-el-noun-prN3kVng",
      "raw_tags": [
        "Peinture"
      ]
    }
  ],
  "word": "οπτική τέχνη"
}

{
  "categories": [
    "Compositions en grec",
    "Locutions nominales en grec",
    "Mots en grec issus d’un mot en anglais",
    "grec"
  ],
  "etymology_texts": [
    "(1964) Traduction de l'anglais optical art,composé de οπτική et de τέχνη."
  ],
  "lang": "Grec",
  "lang_code": "el",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "optikí téchni"
  ],
  "senses": [
    {
      "categories": [
        "Lexique en grec de la peinture"
      ],
      "glosses": [
        "Op art"
      ],
      "raw_tags": [
        "Peinture"
      ]
    }
  ],
  "word": "οπτική τέχνη"
}